Find the real zeros of f and state the multiplicity for each zero. State whether the graph of f crosses or touches the x-axis at each zero. f(x)=-9(x-1)(x+7) The real zeros of f are x=1,-7 (Use a comma to separate answers as needed.) The multiplicity of the smaller zero is (Type a whole number.) The multiplicity of the larger zero is (Type a whole number.) Does the graph of f cross or touch the x-axis at the smaller zero? The graph crosses the x-axis. The graph touches but does not crosses the x-axis. Does the graph of f cross or touch the x-axis at the larger zero?